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AP Biology Metabolism — practice questions — page 2

Explore 58 free Metabolism questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Metabolism questions and exercises with answers

Showing questions 31–58 of 58.

Photosynthesis powers what share of Earth's ecosystems?Read the answer and worked solution →In leaves, most photosynthesis occurs in the middle cell layer called the:Read the answer and worked solution →Gas exchange in a leaf occurs through small regulated openings called:Read the answer and worked solution →Each stoma is flanked by cells that open and close it by swelling or shrinking, called:Read the answer and worked solution →Stacked disc-shaped structures inside a chloroplast where chlorophyll is embedded are:Read the answer and worked solution →A stack of thylakoids is called a:Read the answer and worked solution →The liquid-filled space surrounding the grana, where the Calvin cycle occurs, is the:Read the answer and worked solution →The light-dependent reactions take place in the thylakoid membrane and produce:Read the answer and worked solution →Shorter wavelengths of light carry:Read the answer and worked solution →Which colour of visible light has the shortest wavelength and most energy?Read the answer and worked solution →Chlorophyll appears green because green light is:Read the answer and worked solution →Photosystems are numbered by:Read the answer and worked solution →In photosystem II, the electron lost by the reaction center is replaced by splitting:Read the answer and worked solution →The reaction center of photosystem II is called:Read the answer and worked solution →About what share of oxygen made in a leaf is used by its own mitochondria?Read the answer and worked solution →The flow of hydrogen ions through ATP synthase from the thylakoid lumen to the stroma is called:Read the answer and worked solution →The enzyme that catalyses the reaction between carbon dioxide and RuBP is:Read the answer and worked solution →RuBP, the molecule that starts the Calvin cycle, has how many carbon atoms?Read the answer and worked solution →How many turns of the Calvin cycle are needed to produce one three-carbon G3P for export?Read the answer and worked solution →Cacti conserve water by fixing and storing CO2 temporarily at:Read the answer and worked solution →Catch the light reaction partsRead the answer and worked solution →Pop the Calvin cycle playersRead the answer and worked solution →Run through photosynthesisRead the answer and worked solution →Slice the photosynthesis wordsRead the answer and worked solution →Light reactions or Calvin cycleRead the answer and worked solution →Sort pigments, structures and moleculesRead the answer and worked solution →Type the numberRead the answer and worked solution →Photosynthesis bingoRead the answer and worked solution →

Worked practice questions

Photosynthesis powers what share of Earth's ecosystems?

  1. 99 percent
  2. 50 percent
  3. 75 percent
  4. 10 percent
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Correct answer: A. 99 percent

1. A wolf eating a deer sits at the end of an energy path from the sun. 2. Photosynthesis powers 99 percent of ecosystems. 3. Heterotrophs use the stored carbohydrate energy. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._

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In leaves, most photosynthesis occurs in the middle cell layer called the:

  1. Cuticle
  2. Mesophyll
  3. Epidermis
  4. Stomata
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Correct answer: B. Mesophyll

1. Leaves have several cell layers. 2. The mesophyll holds most chloroplasts. 3. Gas exchange happens through stomata. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._

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Gas exchange in a leaf occurs through small regulated openings called:

  1. Lumens
  2. Stroma
  3. Stomata
  4. Grana
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Correct answer: C. Stomata

1. Carbon dioxide enters and oxygen leaves through them. 2. These openings are stomata. 3. Guard cells open and close them. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._

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More Biology topics

Gene ExpressionEcology and the BiosphereEvolution and the Origin of SpeciesDNA Structure and FunctionCell StructureBiological MacromoleculesCellular RespirationPhotosynthesis